<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>选择器练习</title>
    <style>
        #zxy{
            color: green;
        }
        .c1{
            color: blue;
        }
        h1,h2{
            background-color: yellow;
        }
        input[type='submit']{
            background-color: red;
        }
        input[type='button']{
            color: pink;
        }
        *{
            border: 1px solid red;
        }
    </style>
</head>
<body>
    <ul>
        <li id="zxy">张学友</li>
        <li class="c1">刘德华</li>
        <li>郭富城</li>
    </ul>
    <h1 class="c1">悟空</h1>
    <h1>八戒</h1>
    <h1>唐僧</h1>
    <h2>刘备</h2>
    <input type="submit">
    <input type="button" value="按钮">
</body>
</html>